SB5C

When unlimited resources are in an ecosystem, populations will most likely show which type of growth?

• a

• b

• both

• none of these

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SB5a

Refer to the graph. An increase in the size of a predator population...

• leads to an increase in the size of its prey population

• usually results in the extinction of its prey population

• will cause a decrease in the size of its prey population

• causes no change in the size of its prey population

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SB5a

A pond ecosystem is shown in the diagram. Which statement describes an interaction that does not maintain the dynamic equilibrium of this ecosystem?

• The frogs make energy available to this ecosystem through the process of photosynthesis.

• The algae directly provide food for both the rotifers and the mosquito larvae.

• The green-backed heron gets energy from the catfish.

• The catfish population helps control the populations of water boatman and water fleas.

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SB5a

Which of the following leads to an increase in biodiversity?

• protection of ecosystems

• pollution

• habitat destruction

• introduction of exotic or invasive species

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SB5a

When a population grows past the ecosystem's carrying capacity, what happens to the population?

• Continues to grow

• The population starts to die off to return to carrying capcity

• The population will go extinct due to lack of resources

• The population grows then finds a new carrying capacity

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SB5a

The shrew gets energy from which organism in the picture?

• cricket

• frog

• grass

• snake

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SB5b

Because of sport hunting and the draining of marshlands, the size of the whooping crane population reached a low of 16 individuals in 1940. Since then, conservation efforts have been put in place to increase the whooping crane population size. Which of the following actions would most likely decrease the size of the whooping crane population with the greatest impact on the ecosystem?

• Introducing new insect species for whooping cranes to eat.

• Increasing all wild predators in the whooping crane’s habitat.

• Establishing protected areas for whooping crane breeding and migration

• Counting whooping crane populations by tagging and releasing individual birds

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SB5b

Examine the model of the carbon cycle. Carbon is transferred from one biotic component, the cow, to a second biotic component, the decomposers. Using the model, select ALL the ways that carbon could be transferred from animals to decomposers.

• As waste

• In dead carcasses

• As carbon dioxide

• In scraps of food

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SB5b

Analyze the pyramid representing the energy flow through an ecosystem. Select the phrase(s) that do not describe the flow of energy in this ecosystem according to the image here.

• Top carnivores obtain the maximum energy from the ecosystem.

• Herbivores have more energy available to them than carnivores.

• There should be fewer tertiary consumers than secondary consumers.

• Soil organisms recycle nutrients but not energy back into the ecosystem.

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SB5b

In this Food Web Pyramid what is the proper name for the organisms above the producer level at the bottom.

• herbivores

• consumers

• carnivores

• omnivores

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SB5b